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Seismic dynamic response characteristics and failure mechanisms of an accumulation body slope

Author

Listed:
  • Yang Xinglong

    (North China University of Water Resources and Electric Power)

  • Dong Jinyu

    (North China University of Water Resources and Electric Power)

  • Liu Handong

    (North China University of Water Resources and Electric Power)

  • Bian Shuokang

    (North China University of Water Resources and Electric Power)

Abstract

In order to study the dynamic characteristics and destabilisation damage mode of the accumulation body slope under the action of ground vibration, and to provide theoretical guidance and technical support for the optimization design of reinforcement of similar slopes, a large shaking table model (scale 1:16) test with a specific accumulation body slope was conducted as a prototype. The dynamic response and deformation characteristics of the model slopes were observed by inputting sine, Wolong, and EI Centro waves to the bottom of the model slopes, respectively. The test results showed that in the vertical direction and on the slope surface, the acceleration amplification factor (AAF) increased with the increasing of altitude, and presented a nonlinear change. In the horizontal direction, the AAF increased with distance from the slope surface. There was also a slope surface amplification effect with the AAF reaching its maximum at the slope shoulder. Similar laws were obtained after numerical simulation of the prototype slope by FLAC3D software. Different types of seismic waves exhibited different effects on the AAF. Sine waves showed the largest effect, followed by Wolong waves, and EI centro waves exhibited the smallest effect. The AAF of the modelled slope was different for different input wave frequencies. As the input frequency of Sine waves increased, the AAF increased first and then decreased. This change coincided with the AAF reaching its maximum value at 25–30 Hz. The AAF of the modelled slope varied when the input wave amplitude values were different. When the AAF reached its maximum value, the input amplitude was 0.4 g. By analysing the slope failure progression, it showed that the slope of an accumulation body began with local sliding at the front edge, followed by internal sliding of it, and the overall sliding.

Suggested Citation

  • Yang Xinglong & Dong Jinyu & Liu Handong & Bian Shuokang, 2024. "Seismic dynamic response characteristics and failure mechanisms of an accumulation body slope," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 120(9), pages 8239-8261, July.
    • Handle: RePEc:spr:nathaz:v:120:y:2024:i:9:d:10.1007_s11069-024-06451-1
    DOI: 10.1007/s11069-024-06451-1
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    References listed on IDEAS

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    1. Zefa Li & Zhenyu Wu & Jiankang Chen & Xiang Lu & Liang Pei & Chen Chen, 2021. "Effect of correlated random fields on nonlinear dynamic responses of gravity dam," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 106(1), pages 79-96, March.
    2. Xiaowu Pu & Lanmin Wang & Ping Wang & Shaofeng Chai, 2020. "Study of shaking table test of seismic subsidence loess landslides induced by the coupling effect of earthquakes and rainfall," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 103(1), pages 923-945, August.
    3. R. Sivakumar & Snehasish Ghosh, 2021. "Assessment of the influence of physical and seismotectonic parameters on landslide occurrence: an integrated geoinformatic approach," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 108(3), pages 2765-2811, September.
    4. Kangqi Liu & Hongyan Liu, 2022. "Simulation of the earthquake-induced soil-rock mixed accumulation body sliding movement using discrete–continuous coupled approach," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 114(2), pages 2087-2108, November.
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